The first proper trailer for Trainspotting 2 dropped this morning, set 20 years after the original film.

All the cast are back. A synopsis of the film was sent to journalists: "Other old friends are waiting too: sorrow, loss, joy, vengeance, hatred, friendship, love, longing, fear, regret, diamorphine, self-destruction and mortal danger, they are all lined up to welcome him, ready to join the dance."

It may leave you wondering how much the characters have changed since the original film. Here's a general guide: